138887512625 has 8 divisors (see below), whose sum is σ = 173331615912. Its totient is φ = 111110010000.

The previous prime is 138887512549. The next prime is 138887512637. The reversal of 138887512625 is 526215788831.

It can be written as a sum of positive squares in 4 ways, for example, as 9253670416 + 129633842209 = 96196^2 + 360047^2 .

It is not a de Polignac number, because 138887512625 - 2⁸ = 138887512369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 555549926 + ... + 555550175.

It is an arithmetic number, because the mean of its divisors is an integer number (21666451989).

Almost surely, 2^138887512625 is an apocalyptic number.

It is an amenable number.

138887512625 is a deficient number, since it is larger than the sum of its proper divisors (34444103287).

138887512625 is an equidigital number, since it uses as much as digits as its factorization.

138887512625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111100116 (or 1111100106 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 56.

The spelling of 138887512625 in words is "one hundred thirty-eight billion, eight hundred eighty-seven million, five hundred twelve thousand, six hundred twenty-five".